Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8067339 | Annals of Nuclear Energy | 2017 | 28 Pages |
Abstract
In this paper, the bias in 154Eu is characterized across eleven spent fuel destructive assay benchmarks from five different assemblies. Based on these studies, possible amendments to the ENDF/B-VII.0 and VII.1 evaluations of the 154Eun,γ155Eu are explored. By amending the location of the first resolved resonance for the 154Eu radiative capture cross-section (centered at 0.195 eV in ENDF/B-VII.0 and VII.1) to 0.188 eV and adjusting the neutron capture width proportional to 1/E, the amended cross-section evaluation was found to reduce the bias in predicted 154Eu inventories by approximately 5-7%. While the amended capture cross-section still results in a residual over-prediction of 154Eu (ranging from 2% to 9%), the effect is substantially attenuated compared with the nominal ENDF/B-VII.0 and VII.1 evaluations.
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Authors
Steven E. Skutnik,